Endothermic/Exothermic

Question 1

What does exothermic mean?

Answer 1

An exothermic reaction is a reaction that transfers energy to the surroundings, so the temperature of the surrounding increases

Question 2

Whats an endothermic reaction

Answer 2

A reaction that takes in energy from the surroundings, usually in form of heat, so the temperature decreases

Question 3

The difference between the energy of the product and reactant tells us?

Answer 3

Tells us the energy that has been released to the surrounding

Question 4

Uses of exothermic reactions and an example

Answer 4

An example would be combustion and oxidation reactions
Uses would be self-heating cans and hand warmers

Question 5

Example of endothermic reaction

Answer 5

An example is thermal decompostion

Question 6

Explain endothermic reactions on a energy proifle

Answer 6

The products are at a higher energy than the reactants because it takes in energy from the surroundings

The difference of height shows the energy taken in during the reaction

Question 7

Explain exothermic reactions on a energy profile

Answer 7

The products are at a lower energy than the reactants because energy is given out to surrounding

The difference in height represents the energy given out in the reaction

Question 8

What is activation energy

Answer 8

The minimum amount of energy needed for bonds to break and start a reaction